Chemistry question and answers for July 30, 2023
- Q What volumes (in mL) of 1.0 M triethanolamine and 1.0M HNO3 isrequired to prepare 1.0L of pH 7.76 buffer using triethanolaminethat is 0.020 M in both triethanolamine and triethanolammoniumion?
- Q 4. Under each of the following conditions, please predict theeffect the mutation will have on the rate at which glycolysis willproceed in liver cells:a. Loss of the allosteric site for...
- Q Why do bubbles rise to the surface of Guinness slower than theyrise to the surface of a light beer? (The beers are of very similarviscosity).If you poured the two beers...
- Q Consider the following equilibrium:N2O4(g)?2NO2(g)Thermodynamic data on these gases are given in Appendix C in thetextbook. You may assume that ?H? and ?S? do notvary with temperature.Part A At what temperature...
- Q Describe how you may synthesize the following block copolymer(PMMA-b-PS)? Please describe the following details: whatinitiator(s) should be used, and what is its concentration withrespect to monomer concentrations (suppose [MMA] =...
- Q What is implied by the term “superaromaticâ€, as applied to thereactivity of ferrocene toward electrophilic aromatic substitution?How can this be used to explain the fact that no Lewis acidcatalyst is...
- Q Find ΔE° for the reaction below if the process iscarried out at a constant pressure of 1.00 atm andΔV (thevolume change) = -24.5 L. (1 L ∙ atm = 101...
- Q What is the change in enthalpy (in kJ) under standard conditionswhen 33.75 g of lithium hydroxide dissolves in water? What is thechange in enthalpy (in kJ) under standard conditions when...
- Q A solution of HCl is prepared by diluting 25.0 mL of a 1.0 M HClsolution with enough water to make 750 mL of HCl solution. (Showyour work for all calculations!)a)...
- Q Calculate the pH for each of the following cases in thetitration of 50.0 mL of 0.120 M HClO(aq) with 0.120 M KOH(aq). Theionization constant for HClO can be found here....
- Q How many grams of solute are in each of the followingsolutions?0.437 L of a 0.350 M K2CO3 solution =15.5 mL of a 2.50 M AgNO3 solution =25.2 mL of a...
- Q In the balanced equilibrium reaction: 2 H2S <----> S2 + 2H2, with K = 3.7 x 10-6, if the initial concentration of H2S is0.080 M, what is the final concentration...
- Q 19. Which of the following statements istrue?Choose all that apply.a) Acidic solutions taste bitter.b) Basic solutions taste bitter.c) Acidic solutions cause red litmus to change color toblue.d) Basic solutions cause...
- Q If 11.6 kilograms of Al2O3(s), 53.4 kilograms of NaOH(l), and53.4 kilograms of HF(g) react completely, how many kilograms ofcryolite will be produced? What is the total mass of the excessreactants...
- Q Radiation can be used for chemical reactions, principally tobreak bonds between atoms. From the list below identify the bondwith the highest energy that can be broken by a photon of...
- Q 8. a. What is the molarity of a solution of calcium chloridewhich contains 33500 mg of solute in a total volume of 0.352L?b. What is the molarity of a solution...
- Q The Ksp of PbI2 is 1.4 x 10-8. Calculate the molar solubility ofPbI2 in 0.01 M NaI.1.5 x 10-3 M1.4 x 10-4 M1.4 x 10-6 M5.6 x 10-2 M
- Q Calculate the grams of K2CO3 required toprepare 510.0 mL of a 0.777 g/L K+ solution. [Answer in4 SF].
- Q For a concentration cell:Zn/Zn2+ (0.05M)//Zn2+(1M)/ZnE= 0.035 volta. What can you say about the measured emf of this cell and theconcentration cell of Cu/Cu2+ (0.05M)//Cu2+(1M)/Cu ?b. Why is the standard emf...
- Q Balance the equation__ C8H10(l) + __O2(g)Â Â --> ___CO2(g)Â Â + ___ H2O(g)A) 3275 grams ( 1 gallon ) of xylene (C8H10(l)) are chemically combinedwith oxygen (O2(g)) in this chemicalreaction. Calculate the number of...
- Q Balance the following redox reactions.a) As + ClO3-ïƒ H3AsO3 + HClO Acidic conditions.b) Br2ïƒ BrO3- + Br- Basic conditions.c) MnO2(s) + Cl-(aq) ïƒ Mn2+(aq) + Cl2(g) Acidic conditionsd) N2H4(aq) +...
- Q A system at equilibrium contains I 2 (g) at a pressure of 0.19atm and I(g) at a pressure of 0.22 atm . The system is thencompressed to half its volume....
- Q You have 100ml of 1.0M PIPES buffer at the pH = 5.76. The pKafor PIPES is 6.76. How much 10 M NaOH would you need to add tochange the pH...
- Q A 2.335 gram sample of an organic compound containing C, H and Ois analyzed by combustion analysis and 5.030 grams of CO2 and 2.060grams of H2O are produced. In a...
- Q I need to identify the cations A through G as K+, Cu2+, Ag+,Ba2+, Fe3+, Mg2+, or Pb2+The unknown cation is Br-/OH-From what I believed I've figured out is:K+ = FCu2+...
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